Kilograms are a measure of mass, not of weight.
penny
weigh the penny on a scale to the nearest gram
No, millilitres is a measure of volume not mass. You would use milligrams.
Milligram: to measure its mass.
The most common thing you would measure mass in would be grams and kilograms
You Use Atomic Mass Number
grams which unit would you use to measure the mass of a mouse
Mass is measured using kilograms.
Kilograms
in tons.
Grams